Overseaming sewing-machine.



PATENTED SEPT. 6, 1904.

H. A. MILLER. OVERSEAMING SEWING MACHINE.

APPLICATION FILED MAR. 5,190.1.

4 SHEETS-SHEBT 1.

NO MODEL.

Inventor.

\(Vitnesses.

Attorney.

PATENTED SEPT. 6, 1904.

H. A. MILLER. OVERSEAMING SEWING MACHINE.

APPLICATION FILED MAB..6,1901.

4 SHEETS-SHEET 2.

N0 MODEL.

Inventor.

Kw Attorney.

Witnesses No. 769,392. PATENTED SEPT. 6, 1904. H. A. MILLER.

OVERSEAMING SEWINGMAGHINE.

APPLICATION FILED MAB. 5.1901

N0 MODEL. 4 SHEETS-SHEET 3.

\Nimeses. Inventor.

Attorney.

No. 769,392. PATENTED SEPT. 6, 1904. H. A.,MILLER. OVERSEAMING SEWING MACHINE.

APPLICATION FILED MAR. 5,1901. N0 MODEL.

4 SHEETS-SHEET 4 JJ MWM Attorney.

i. lNITED STATES Patented September 6, 1904.

PATENT OFFICE.

NEW YORK, ASSIHNOR TO FRED REED. OF ROCHESTER. NEW YORK, AND CLARENCE L. EATON, OF

\VORCEST ER, M ASSACH USE'lTS.

OVERSEANHNG SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 769,392, dated September 6, 1904.

Application filed March 5, 1901.

To all 11-710! it may concern.-

Be it known that I, H ERBERT A. MILLER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in OverseamingSewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this speci- 1O lication, and to the reference-numerals marked thereon.

My present invention relates to sewing-machines, and particularly to that class adapted for binding or over-casting the edges of goods or fabrics, such as the parallel edges of two superposed pieces of material; and it has for its object to provide amachine which embodies generally upper and lower thread-carrying needles and a looper operating conjointly therewith, whereby a single thread may be employed and so carried over the edges of the goods as to form a thorough protection therefor.

To these and other ends my invention con- 2 5 sists in certain improvements and combinations of parts, all as will be fully described, and the novel features pointed out in the claims at the end of this specification.

.ln the accompanying drawings, Figure 1 is 0 a vertical sectional view of the operating parts of a sewing-machine embodying my improvement with the thread holding and tension devices omitted; Fig. 2, a horizontal sectional view taken just below the cloth-plate, show- 3 5 ing the cam for operating the looper-hook in section; Fig. 3, a vertical sectional view showing the main operating-cam of the looper and the connection thereof with the block carrying the looper-hook, the hook and its block being 4 shown in elevation. Figs. at, 5, and 6 are side elevations showing the positions of the needles and looper during the stitch-fceding'operation. Figs. 7, 8, an 9 are plan views showing the positions of the stitch-feeding mechanism corresponding to those shown in Figs. 4, 5, and 6. Figs. 10 to 14, inclusive, are perspective views showing the positions of the parts during the stitch-feeding operation.

Serial No. 49,945- (No model.)

Fig. 15 is an enlarged view of the stitch formed by the machine.

Similar reference-numerals in the several figures indicate similar parts.

The objects incident to a sewingmachine constructed in accordance with my invention are to provide a complete protection for the edge of a fabric or material by a substantially continuous line of adjacent and laterally-extending threads or cords and the production of such a binding or protected edge without the necessity of operating the machine at an 0 excessive speed, the two threads being carried over the edge and secured at each stitch, so that the speed of the machine need not be greater than that of an ordinary single or double thread sewing-machine, and the fabric 5 or material operated upon is in such relation. to the operating parts that the operator may manipulate the work readily whatever its size or shape may be.

In illustrating my invention I have not 7 deemed it desirable to show the tensions or take-ups or the bobbins or spools carrying the thread or cord, as these parts may be of any desired or usual construction, but have illustrated the stitch-forming mechanisms and 7 5 their operating devices only.

The main frame of the machine embodies, as usual, a cloth-plate or Work-support 1, from which extends a vertical standard 2, having at the upper portion an overhanging arm 3, and at the forward end of the latter is an ordinary reciprocating needle-bar 4, connected by a pitman 5 to a crank on the end of' a shaft or arbor 6, extending through the overhanging arm of the machine. The shaft 6-is pro- 5 vided near its rear end with two cranks, connected by pitmen T with corresponding cranks upon the operating-shaft 8, located, preferably, below the cloth-plate or work-support, either of the shafts 6 or 8 being driven in any 9 suitable manner. The lower shaft 8 operates an ordinary four-motion w0rkfeed,being provided, as usual, with an eccentric 9, around which extends the yoke or strap on the end of a pitmanlO, connected mediate-1y or immediately to the pivoted feed-bar ll, carryformed'in the inner face of the disk 19.

ing the serrated feed-plate 12-at its outer free end, which is adapted to be raised and lowered, as usual, by means of a cam or eccentric 13 on the shaft 8. This serrated feed-plate extends up through the usual opening in the cloth-plate or work-support in proximity to the path described by the upper needle.

14 indicates a beveled pinion. mounted on the shaft 8, meshing with acorresponding pin ion-15 on a stud or arbor 16, journaled in a supplementary frame 17 beneath the worksupport,the outer end of said stud being formed With or attached to a disk or cam, provided with a cam-track 18 and having on its inner face'a disk or cam 19, adjustably secured thereto by a screw 20, these connected cams .serving to operate the looperhook and the lower needle.

21 indicates a stud or roller operating inthe cam-track 18 and'conneeted to a reciproeating bar 23, mounted in guides in the lower portion of the frame and having a roller or stud 24 operating in the guide 25, said bar serving to operate the lower curved needle 26' in a curved path and on a center located, preferably,forward or outsideof the path described by'the vertically-reciprocating needle 36, secured to the needle-bar 4. In the present embodiment this curved needle 26.is removably secured in a segmental block 27, operating in.

a curved or segmental groove or way formed in a stationary-block or guide 28, said block 27 having one end of a pitman 29 pivoted thereto, the other end of which is connected at 30 to the reciprocating bar 23. V 31 indicates the reciprocating and laterallyoscillating looper or loop-spreader, having the triangular hooked end 32 the shoulder 33 extending downwardly beneath it, and at' the inner side the small notch 34. This.

looper is adjustablysecured to a block 35, having a downwardly-extending pin 37 guided in a cam-slot 38 and connected at its lower end by a nut 137 to'a sliding block 39, pro- .vided in rear of the pin 37 with a stud haveye 44, arranged below, through which passes the lower'thread 45, extending from a suitable supply or bobbin, passing laterally through the eye 44, then alongside the needle, through the eye 43 in the opposite direction, thence extending upward to the fabric. The upper thread passes laterally through theeye 46 of the upper needle 36 and down to the fabric, said needle 36 being provided witha groove 56in one side only and that the side to which the upperthread extends from the upper supply and tension devices.

The slight backward movement, or,

to put it otherwise, the pause in the movement of the curved needle, is accomplished at the. time that the upper needle 36 is passing down through the loop, as shown in Fig. 14.

The cam-slot 38; in which the pin 37 of the looper-carrier 35 operates, is so arranged rel-. ative to the cam-track in'the disk 19'that the looper is first moved outward, the first portion of the movement throwing the outer or hooked endof the looper down (with refer-' ence to the bottom of Fig. 2) and then up.

Then the looper fnoves outwardly in a right line, and during the'back ward movement the hooked end is moved up and then down again tothe position shown'in Fig. 2 in full lines.

The stitch'formed by the sewing mechanism is shown clearly in Fig. 15, the under thread presenting at the edge of the fabric a series ofloops which are given a half twistor turn and -interlocking with the loopsof the upper thread, which extend through the edge of. thefabric and at the bottom extend around the loops of the lower thread. The. half-twist referred to above is given to the thread because the feed of the fabric is away from that side of the under needle on which the upper needle passes, as shown in Figs. 10 to 14, inclusive. The various positions of the needles and the looper are illustrated in Figs. 4 to 9, inclusive, and the cycle of operations in the formation of-. the stitches'is' shown clearlyin Figs. 10 to 14, inclusive.

, As shown in Fig. 10, the upper needle has. passed through the fabric near the edge,earrying the upperthread 55 with it, and the tension being removedfrom the thread on thef side in which there is no groove the thread is held during the upward movement ofthe nee dle by frictionally engaging the goods, leaving the loop at the side of the needle, as shown in Fig. 11. Then thelooper or spreader passes through the loop or bight of the upper thread 55, as shown in Fig. 12, the lower needle '26 having been withdrawn, and spreads the loop so that said lower curved needle may then pass up through the loop, carrying the bight of the lower thread 45, and the upper needle 36, 'having been withdrawn previously, now descends and passes through the loop formed around the lower needle, the position of. the parts at I the beginning of the descent of the upper needle being shown in Fig. 14, and the upper needle 36 begins to descend while the lowerneedle 26 is being Withdrawn to carry the bight of the lower thread 45 through the loop fed around it.

It will be noted that the lower needle 26 passes entirely outside of the fabric and is simply a thread-carrier and does not serve to puncture the goods and that the feed of the goods or work in a straight line is accomplished by the movement-of the feed-plate in lo the direction of the arrow, Fig. 2, while the upper needle is elevated. The feed-plate of course holds the work against an ordinary presser-foot or similar device, which being of the usual construction and common toall sew 1'5 ing-machines I have only shown in Fig. 1 of the drawings in outline.

. The lateral movement of the looper or spreader 31 in the present construction is simply for the purpose of clearing the lower needie or loop-carrier, as shown in Fig. 8.

While I have shown the lower needlepassing entirely outside of the fabric and operating to form a stitch over the edge of the goods, it will be understood that itisequallycapa- 2 5 ble of operating through the fabric and that the same stitch may be employed for other purposes than that described, such as sewing tapes on garments, securing the overlapped ends of buckle-straps, and for performing 0 similar operations.

' I' claim asmy invention 1. In a sewing-machine, the combination with a"worksupport,' a feeding mechanism operating to feed the work over the support 35 in a straight line, a verticallyreciprocating upper thread carrying needle, a .curved thread-carrying needle normally beneath the work-support and reciprocatingabove it, in a plane transverse of the line of feed, a hooked looper beneath the work-support cooperating with the curved needle, the looper-block, the reciprocating bar pivotally connected to the block and the cam with which the block cooperates. 45, 2. Ina sewing-machine, the combination with the upper threadcarrying needle, and the lower curved thread-carrying needle, of the looper-block having a projection thereon, a ca mguide in which the projection operates for'moving it laterally, means for reciprocating the block, and the hooked looper mounted on theblock and cooperating with the thread from the upper needle for the passage of the lower needle. v 3. In a sewingmachine, the combination with the uppersthread-carrying needle and the lower curved thread-carrying needle, of the hooked looper cooperating with the thread on the upper needle topermit the passage of the lower needle, the looper-block, a guide for the block havinga lateraloffset, a reciprocating bar having a pivotal connection with the block and ii rigid guide for said bar.

4:. In a sewing-machine, the combination with the upper thread-carrying needle and the lower curved thread-carrying needle, of the hooked looper cooperating with the thread on the upper needle to permit the passage of the curved needle, the looperblock having the projection, the frame having the cam-slot in which the projection operates, a reciprocating operating-bar, a straight guide for the bar and a pivoted connection between said bar and the block.

5. The combination with the upper threadcarrying needle and the lowercurved threadcarrying needle, of the frame or support having the guide 38, the looper cooperating with the thread of the upper needle for the passage of the lower needle having the pin. 37 connected thereto and operating in the guide, the reciprocating bar 41, the straight guide therefor and pivotal connections between the bar and looper to permit the lateral movementof the latter; 8 5

6. The combination with the upper threadcarrying needle and means for reciprocating it, of the shaft 8, a work-feed device operated thereby, a disk driven from the shaft 8, havingtwo' cam-surfaces thereon, the lower curved thread-carrying needle reciprocating over the edge of the material operated upon, the looper, and connections between said camsurfaces, and the lower needle and loo'per, for reciprocating the latter transversely of the line of feed, and means for moving the looper laterally during its reciprocatory movement.

7. The combination with the upper threadcarrying needle and means for operating it,

the shaft 8, the cams thereon, and a four-motion work-feeding-device operated thereby, of the disk having two cam-surfaces and connected to and operated by the shaft 8,.the

bars reciprocated by the cam-surfaces transversely of the direction of motion of the feed, 5'.

the looper and the curved lower thread-carrying needle actuated by the bars and oscillated over the edge of the material operated upon, and means for moving the looper laterally during its reciprocatory movement.

8. The combination with the shaft 8 and the work-feeding devices extending transversely of the shaft and actuated thereby, of a disk having two cam-grooves and rotating on a center extending transversely to the plane of II 5 the shaft 8, the looper, the lower curved thread-carrying'needle oscillating over the edge of the material operated upon and the bars operated by the cam-surfaces in planes parallel with that of the shaft 8 and connect- I20 ed to the looper and needle.

HERBERT A. MILLER.

IIO

Witnesses:

G. WILLARD RICH, WALTER B. PAYNE. 

